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Jon-Ryan Maloney
5,704 PointsStruggling to understand Java arrays
I'm struggling to understand this logic from the Java arrays workshop:
String[] names = {"Ben", "Jerry", "Geoff", "Ryan"};
Cow[] cows = new Cow[names.length];
for (int i = 0; i < (names.length); i++) {
cows[i] = new Cow(names[i]);
}
for (Cow cow : cows) {
console.printf("%s%n",
cow.getName());
}
Why did we declare a new array of Cows if we already did with the String array above it? Why isn't that redundant?
Also, why did we need to use two for loops?
1 Answer
Jon-Ryan Maloney
5,704 PointsThanks Lukas. I just got overwhelmed with the multiple steps that didn't seem necessary. I'll check out your link.
Lukas Baumgartner
14,817 PointsLukas Baumgartner
14,817 PointsI've not watched the video, but:
I guess it's just to show how things work. You maybe won't do it that way in a "real" program.
Also just a guess, but I think they just want to let you know about the kinds of for loops you can use on arrays. The first one is a "normal" counting for loop, nothing special about it. The second one is an enhanced for loop, you can read it out loud kind of that way: for each Cow in the cow array, do something
Maybe you find this interessting: https://stackoverflow.com/questions/11555418/why-is-the-enhanced-for-loop-more-efficient-than-the-normal-for-loop